As shown in Fig. REF , the BYOL-A augmentation module is composed of pre- and post-normalization blocks and three augmentation blocks: Mixup[1]} (Section REF ),
Random Resize Crop (RRC, Section REF ),
and Random Linear Fader (RLF, Section REF ).
Mixup makes random background sound, RRC makes random frequency/time shift/stretch, and RLF makes random temporal amplitude change, a simulation of random fade in/out.
